@book{85553,
	author = {Randa Nabil Elsalawy and Ahmed Nour Eldein Habib , },
	title = {The effect of composition and hydrolytic degradation of light activated composite resins on their wear and fracture toughness / },
	publisher = {Randa Nabil Elsalawy , },
	year = {2001},
	address = {Cairo : },
	url = {http://172.23.153.220/th.pdf}
}